JP3159578U - Portable toothbrush - Google Patents

Abstract

Provided is a portable toothbrush that is not bulky while being carried while maintaining a high feeling of use and toothbrushing efficiency. A toothbrush body 21 having a head portion 25 in which brush bristles 23 are implanted, a rod-like support rod portion 27 having a head portion attached to the tip thereof, and a hollow grip having an internal space. A gripping portion having a through hole through which the base end of the support rod portion is accommodated in the internal space and the head portion protrudes, and the support rod portion is slidably penetrated. A cap portion 61 is provided that covers a portion of the toothbrush main body protruding from the through hole at at least one of the sliding positions with respect to the hole and is detachably attached to the grip portion. [Selection] Figure 2

Description

  The present invention relates to a portable toothbrush, and more specifically, when it is used for toothbrushing, it has a sufficient length and can be shortened when not used for toothbrushing. The present invention relates to a portable toothbrush that is not bulky (shortened) when carried.

In order to prevent periodontal disease, tooth decay and bad breath, various portable toothbrushes used for brushing teeth on the go have been proposed (see, for example, Patent Document 1).
Patent Document 1 discloses that in portable toothbrushes used on the go, “there are many cases where water cannot be used sufficiently on the go, etc. In such a case, the brush bristles 4 are sufficiently used after use. It was made in view of the “problem that it cannot be cleaned and there is a sanitary problem” (Patent Document 1, paragraph No. 0003 in the detailed description of the invention). A toothbrush having a grip body 20 and a cap, and a brush body 15 having a brush 17 implanted on the surface thereof, which is detachably attached to a protrusion 18 at the tip of a brush support 13 formed at the tip of the grip 20. The disposable brush body 15 is housed inside the grip portion 20 so that it can be used multiple times. "(Patent Document 1, Summary Solution) is disclosed.

  In such a portable toothbrush of Patent Document 1, since the brush body is detachable from the body of the portable toothbrush, the brush body is made disposable, that is, the used brush body is portable. Since it can be easily removed from the main body of the toothbrush and discarded, it can solve the hygiene problem, and the brush support 13 is covered with the cap 30 so that the portable toothbrush can be kept clean, Moreover, since the overall shape is a flat oval and compact shape, it can be inserted into, for example, a pocket of clothes and carried by hooking the hook 31 to the edge of the pocket, etc. Further, inside the grip portion 20. Since a plurality of spare brush bodies 15 are accommodated in the storage space 29 formed, it can be used multiple times. " Document 1, in the detailed description of the invention, paragraph No. 0007).

JP-A-2006-239451 (for example, abstract, paragraph numbers 0001 to 0007, FIGS.

According to the portable toothbrush of Patent Document 1, even if the brush bristles 4 cannot be sufficiently washed after use, the problem of hygiene can be solved by making the brush body disposable. The grip portion 20 and the brush support portion 13 formed at the tip thereof are integrally formed, and since the length formed by these is long, the portability of the portable toothbrush of Patent Document 1 is reduced (the grip portion 20 and the brush The portion including the support portion 13 is long and bulky, which may cause a problem of being disturbed when being carried.
On the other hand, the grip portion 20 that the user of the portable toothbrush grips with the hand and the brush support portion 13 that supports the brush body 15 can maintain the feeling of use of the portable toothbrush and the efficiency of brushing at a certain level. , Can not be too short.
Therefore, an object of the present invention is to provide a portable toothbrush that is not bulky while being carried while maintaining a high feeling of use and toothbrushing efficiency.

  A portable toothbrush of the present invention (hereinafter referred to as “the present toothbrush”) is a toothbrush having a head portion in which brush hairs are implanted and a rod-like support rod portion having a head portion attached to the tip. A main body and a hollow gripping portion having an internal space, the base end of the support rod portion being accommodated in the internal space, and having a through-hole that slidably penetrates the support rod portion with the head portion protruding. A portable toothbrush comprising: a gripping portion; and a cap portion detachably attached to the gripping portion that covers a portion of the toothbrush main body that protrudes from the through hole at a sliding position of the support rod portion with respect to the through hole. It is.

The toothbrush includes a toothbrush body, a gripping part, and a cap part.
The toothbrush main body has a head portion in which brush hairs are implanted, and a rod-like support rod portion having a head portion attached to the tip.
The grip part is a hollow part having an internal space, and has a through-hole through which the support bar part of the toothbrush body passes. The through hole of the gripping part is such that the base end of the support bar part of the toothbrush body (the end opposite to the end to which the head part is attached) is accommodated in the internal space of the gripping part and the head part of the toothbrush body protrudes In this state, the support bar is slidably penetrated.
The cap portion is detachably attached to the grip portion, and covers the portion of the toothbrush body that protrudes from the through hole of the grip portion in a state of being attached to the grip portion. In addition, the cap part attached to the holding part may be such that the support bar part can cover the portion of the toothbrush body protruding from the through hole in at least one (at least one) sliding position with respect to the through hole. Well, it is not necessary for the support bar part to be able to cover the portion of the toothbrush body protruding from the through hole at two or more sliding positions with respect to the through hole (of course, the support bar part is required to cover two or more with respect to the through hole). It may be possible to cover the portion of the toothbrush body protruding from the through hole at the slide position.
According to this toothbrush, when carrying, the support rod portion is accommodated in the internal space of the gripping portion as much as possible (the support rod portion is retracted so that the length protruding from the through hole is as small as possible). The cap part is attached to the gripping part in a state where the support bar part is slid with respect to the hole, and the part of the toothbrush body protruding from the through hole is covered with the cap part. And when brushing with this toothbrush, remove the cap part from the gripping part, and make the head part project as much as possible (draw the support bar part so that the length projecting from the through hole is as large as possible) Toothbrushing may be performed with the support rod portion slid with respect to the through hole. Thus, when using this toothbrush for toothbrushing, the head part and the support bar part are projected from the through hole to improve the feeling of use of the toothbrush and the efficiency of toothbrushing, and when carrying the toothbrush. Can be carried in a compact and compact state by attaching the cap part to the gripping part with the support bar part retracted so that the length of the support bar part protruding from the through hole is small. It is a portable toothbrush that is not bulky when carried while maintaining a high feeling of use and toothbrushing efficiency.

In the present toothbrush, the support bar portion may be fixed to the grip portion (hereinafter referred to as “slide fixed main toothbrush”) at a predetermined slide position with respect to the through hole.
By using this toothbrush, when the toothbrush is used, the sliding position of the support bar part with respect to the through hole that can improve the feeling of use of the toothbrush and the efficiency of toothbrushing (the predetermined slide position. The support rod portion can be fixed to the gripping portion at the most protruding position from the hole), so that the sliding position can be maintained when brushing with the toothbrush. It is possible to maintain a state where the feeling of use and the efficiency of brushing are improved.

In the sliding fixed main toothbrush, the support bar portion has a tapered portion whose width is tapered toward the distal end direction, and the inner surface of the through hole abuts on the tapered portion at the predetermined sliding position, and the tapered portion May be prohibited from further moving in the distal direction with respect to the through hole.
The support bar part of the toothbrush body usually has a tapered part whose width (dimension along the direction perpendicular to the longitudinal direction of the support bar part) decreases (taperes) toward the tip direction (direction toward the head part). Therefore, at the predetermined slide position (the slide position that can improve the feeling of use and brushing efficiency of the toothbrush), the tapered portion comes into contact with the inner surface of the through hole. Further movement with respect to the distal end direction (head portion direction) with respect to the through hole can be reliably prohibited with a simple configuration, and the support bar portion can be reliably fixed to the grip portion at the predetermined slide position.

In the sliding fixed main toothbrush, the inner surface of the through hole may be in surface contact with the outer surface of the support bar at the predetermined sliding position.
At the predetermined sliding position that improves the usability of the toothbrush and the efficiency of toothpaste, the inner surface of the through hole comes into surface contact with the outer surface of the support rod portion so that the support rod portion is fixed to the gripping portion. If this is the case, the support rod portion is supported with respect to the through hole of the gripping portion as compared to the case where the support rod portion is fixed to the gripping portion by the point contact or the line contact with the outer surface of the support rod portion. By preventing or reducing wobbling and securely fixing the support bar part to the gripping part, it is possible to further improve the reliability of the toothbrush and the usability and efficiency of toothbrushing with the toothbrush. .

In this toothbrush, the gripping part forms an inner surface of the through hole and is detachable through the support bar part, and a main body part having a fitting hole in which the sleeve through which the support bar part passes is detachably fitted. In other words, the support rod portion may be one that can be removed from the insertion hole in the state where the sleeve is removed from the insertion hole (hereinafter, referred to as “sleeve-using toothbrush”).
The toothbrush body of the present toothbrush (especially the brush bristles implanted in the head part) is damaged when the toothbrush is used for tooth brushing, and may be replaced as necessary. Although there are various methods for configuring the toothbrush body in the toothbrush so that the toothbrush body can be replaced, the gripping part includes a body part having an insertion hole and a sleeve that is detachably attached to the insertion hole and forms an inner surface of the through hole. The sleeve should be able to penetrate the support rod part (penetrate the support rod part or extract the penetrated support rod part), and the sleeve through which the support bar part penetrated can be freely inserted into the insertion hole of the main body part. Fit. Then, in a state where the sleeve through which the support rod portion has passed is removed from the insertion hole, the support rod portion can be removed from the insertion hole (the insertion hole is larger than the sleeve inner surface (the inner surface of the through hole) through which the support rod portion passes). The support bar portion can be easily extracted or inserted into the insertion hole.) Since it can be easily formed, the toothbrush body can be removed from the gripping portion or attached to the gripping portion freely. The toothbrush body can be easily replaced in the present toothbrush.

In the present toothbrush using the sleeve, the sleeve may have at least one or more divided portions formed in a direction in which the support bar portion that penetrates the sleeve continues.
In this toothbrush using a sleeve, in order to make the support rod portion a pierceable sleeve, the sleeve is made of a material having sufficient flexibility (for example, rubber or resin), or the support rod portion penetrated into the sleeve If the dividing portion is 1, the sleeve is one piece, but if the dividing portion is 2, the sleeve is two pieces. The dividing portion is 3 pieces. You may make it have.) By expanding the dividing portion in this way, it is possible to easily penetrate the support rod portion into the sleeve (penetrate the support rod portion or extract the penetrated support rod portion).

In the present toothbrush using a sleeve, the gripping portion has a communication port for communicating the internal space and the external space through which the sleeve can be extracted from the internal space (hereinafter referred to as a “communication port holding main toothbrush”). ).
The gripping portion includes a sleeve that forms the inner surface of the through-hole and can be inserted into and removed from the support rod portion, and a body portion that has a fitting hole that removably fits the sleeve that the support rod portion penetrates. When the sleeve can be removed from the hole, the sleeve can be removed outward (external space side) from the insertion hole in order to prevent the sleeve from accidentally falling out of the insertion hole. It is often safer to allow the sleeve to be removed from the insertion hole toward the inner side (the inner space side). By removing the sleeve from the insertion hole inward (toward the internal space) in this way, the sleeve removed from the insertion hole can be removed from the internal space, or the sleeve can be inserted again via the internal space. In order to fit inside the hole, the grip portion may have a communication port that allows the internal space and the external space to communicate with each other so that the sleeve can be extracted from the internal space.

In the case of the communicating-port-owned toothbrush, the gripping portion may have an openable / closable lid that is detachable from the communicating port.
As described above, the communication port that communicates the internal space and the external space is formed by removing the sleeve removed from the fitting hole from the internal space to the external space, or again connecting the sleeve from the external space via the internal space. It is necessary to make the internal space communicate with the external space when it is fitted into the insertion hole. For this reason, you may make it a grip part have an opening-and-closing lid which can be attached or detached to the communicating port which can open and close a communicating port as needed.

In the present toothbrush, a male screw portion formed on one outer peripheral surface of the grip portion and the cap portion and a female screw portion formed on the other inner peripheral surface are screwed together. The cap portion may be detachably attached to the grip portion.
By doing so, the male screw portion formed on the outer peripheral surface and the female screw portion formed on the inner peripheral surface are screwed together, so that the cap portion is detachably attached to the grip portion. The cap portion can be easily and securely attached to the portion. If a male screw part is formed on the outer peripheral surface of the gripping part, a female screw part is formed on the inner peripheral surface of the cap part (one of which is a gripping part and one of the other is a cap). In the case where a male screw part is formed on the outer peripheral surface of the cap part, a female screw part is formed on the inner peripheral surface of the grip part (any one of which is a cap part, Either one is the gripping part).

It is a figure which shows the portable toothbrush (this toothbrush) of one Embodiment of this invention. It is DD sectional drawing of FIG.1 (b). It is a figure which shows the bush 41 (bush 41a, 41b). It is a figure which shows the place which removed the cap part and the plug. It is sectional drawing which shows the place which removed the cap part and the plug. It is a partially expanded sectional view of FIG. It is sectional drawing of FIG. It is a figure which shows the place which pulled out the toothbrush main body fully from the state of FIG. It is sectional drawing of FIG. It is a figure explaining replacement work of a toothbrush body.

  Embodiments of the present invention will be described in detail with reference to the drawings, but the present invention is not limited thereto.

1A and 1B are diagrams showing a portable toothbrush 11 according to an embodiment of the present invention (specifically, FIG. 1A is a plan view, and FIG. 1B is a front view (FIG. 1A). 2) is a sectional view taken on line DD of FIG. 1B, and FIG. 3 is a bush 41 (bush 41a described later). , 41b) (specifically, FIG. 3 (a) is a front view, and FIG. 3 (b) is a left side view (as viewed from the direction of arrow E in FIG. 3 (a)). 3 (c) is a right side view (showing the direction seen from the direction of arrow F in FIG. 3 (a)). FIG. 4 shows a cap portion 61 and a later-described cap portion 61. FIG. 5 is a view showing a place where the plug 51 is removed (shown from the direction of arrow Y in FIG. 1B), and FIG. FIG. 6 is a cross-sectional view (showing a cross section similar to FIG. 2) showing a place where 1 and the plug 51 are removed, and FIG. 6 is a partially enlarged cross-sectional view of FIG. 7 is a cross-sectional view of FIG. 6 (specifically, FIG. 7 (a) is a cross-sectional view taken along line AA in FIG. 6 and FIG. 7 (b) is a cross-sectional view taken along line BB in FIG. 6). . The toothbrush 11 will be described with reference to FIGS. 1 to 7. Note that the BB cross section of FIG. 6 shown in FIG. 7B is just along the joint 49 of the pair of bushes 41a and 41b, and therefore the bush 41b is not a cross section in FIG. 7B. .
The toothbrush 11 generally includes a toothbrush main body 21, a grip portion 31, and a cap portion 61.

The toothbrush main body 21 has brush bristles 23 constituted by a large number of bristles, a head portion 25 in which the bristles 23 are implanted, and a rod-like support bar portion 27 with the head portion 25 attached to the tip. It becomes. Here, the head portion 25 and the support rod portion 27 are integrally formed of a resin material. In addition, the structure of the above toothbrush main body 21 is the same as that of a commercially available toothbrush.
The rod-shaped support rod portion 27 includes a truncated cone portion 27a (provided that r1 <r2) having a radius r1 of an upper base and a radius r2 of a lower base, and an upper base (diameter is r1 <r2). A small radius r1 side) and a connecting portion 27b for connecting the head portion 25 are integrally provided. The connecting portion 27b has a cylindrical shape whose axis is a straight line that intersects the axis of the truncated cone formed by the truncated cone portion 27a at a predetermined angle (about 20 degrees here). Hereinafter, the axis of the (right) truncated cone formed by the truncated cone part 27a (referred to as a line segment connecting the circular center formed by the upper base of the truncated cone and the circular center formed by the lower bottom of the truncated cone). .) Is called a reference straight line, and is shown as a straight line L (dotted line in the figure).

  The grip portion 31 includes a grip body portion 33, a bush 41, and a plug 51.

The bush 41 is composed of a pair of bushes 41a and 41b (both of which are formed of a flexible resin material) that are formed by cutting a hollow cylindrical member having both ends open along a plane including a straight line L. . The outer surface of the cylindrical member is a large outer peripheral portion that is the same surface as the side surface of the right circular cylinder having the radius rba1 with the straight line L as the axis, and the same surface as the side surface of the right circular cylinder with the radius rba2 having the straight line L as the axis. And a certain small outer peripheral portion (rba1> rba2). The inner surface of the cylindrical member (the surface defining the internal space) forms a large inner peripheral portion (the inner surface of the large outer peripheral portion) which is the same surface as the side surface of the right circular cylinder having the radius rbb1 with the straight line L as an axis. And a small inner peripheral portion (mainly forming the inner surface of the small outer peripheral portion) which is the same surface as the side surface of the (conical) truncated cone with the straight line L as an axis. The (conical) truncated cone in which the small inner periphery forms a side surface has an upper base radius rbb2a and a lower base radius rbb2b (note that rbb2a <rbb2b. The lower base of the radius rbb2b exists on the large inner periphery side. Rbb2b <rba2, rbb1> rbb2b, rbb1 <rba1), and the small inner periphery can fit the truncated cone part 27a (r1 <rbb2a <rbb2b <r2) and a predetermined part of the truncated cone part 27a Is shaped so as to be able to come into close contact with the substantially entire surface of the small inner peripheral portion (the predetermined portion of the truncated cone portion 27a has a straight line L of an upper base radius rbb2a and a lower base radius rbb2b as an axis ( I) A frustoconical shape (substantially the same shape as the small inner periphery). Since one of the hollow cylindrical members open at both ends is cut by a plane including the straight line L and the other is the bush 41b, the bush 41a and the bush 41b are connected to the plane. When combined with, the cylindrical member can be formed.
In the state shown in FIGS. 1, 2, and 4 to 7, the bush 41 is disposed in the internal space of the grip main body 33 in a state where the bush 41 a and the bush 41 b are combined on the plane to form the cylindrical member. ing. In order to facilitate understanding of the state in which the bush 41a and the bush 41b are combined, in FIG. 6 and FIG. 7, the joint 49 between the bush 41a and the bush 41b is shown enlarged.

  The grip main body 33 is a hollow cylindrical member (here, made of aluminum) having both ends opened, and has an internal space for accommodating a pair of bushes 41a and 41b combined. Specifically, the internal space of the gripping main body portion 33 includes a rectangular column portion having a radius rba1 (accommodating a large outer peripheral portion) having a straight line L as an axis and a small rectangular column having a radius rba2 having a straight line L as an axis. Part (accommodating a small outer peripheral part). The outer surface of the gripping main body 33 forms an outer peripheral surface similar to the side surface of a right circular cylinder having a radius r5 with the straight line L as an axis (where r5> rba1). On the outer peripheral surface (the radius is slightly smaller than r5) on one end side of the grip main body 33 (the side on which the small cylindrical portion is formed at both ends along the straight line L), the straight line L is the center. A male threaded portion 34a (which is threadedly engaged with a female threaded portion 61b screwed on an inner peripheral surface of a cap portion 61 described later) is formed. On the inner peripheral surface of the other end side of the gripping main body portion 33 (the side where the straight cylindrical portion is formed at both ends along the straight line L), an internal thread portion 34b (a plug main body 53 described later) centering on the straight line L is provided. And a male threaded portion 53b that is screwed on the outer peripheral surface of the outer peripheral surface.

  The plug 51 is integrally formed of the same material (in this case, aluminum) as the grip body 33, and more specifically, a plug body 53 having a hollow right circular cylindrical shape with the straight line L as an axis, and the straight line L as an axis. And a plug lid 55 attached to the plug main body 53 so as to block the opening at the bottom of the plug main body 53. On the outer peripheral surface of the plug main body 53, a male screw portion 53b that is screwed into the female screw portion 34b of the grip main body portion 33 is threaded.

  The cap portion 61 has a shape of a closed and bottomless shape (one end is opened and the other end is closed) having a hollow cylindrical shape with a hollow radius r5 about the straight line L, and in the vicinity of the opened end portion. A female screw portion 61b that is screwed into the male screw portion 34a of the gripping main body 33 is threaded on the inner peripheral surface.

As shown in FIG. 2, the present toothbrush 11 as described above inserts the truncated cone portion 27a of the support rod portion 27 of the toothbrush body 21 into the internal space of the gripping body portion 33 from the bottom (radius r2) side, The bush 41a and the bush 41b are inserted into the internal space of the grip body 33 through the opening in which the female thread portion 34b of the grip body 33 is formed, and the truncated cone portion 27a is fitted into the small inner periphery of the bush 41. The bush 41a and the bush 41b are combined in such a manner.
Next, the plug 51 is attached to the grip main body 33 by screwing the male screw portion 53 b of the plug 51 into the female thread portion 34 b of the grip main body 33. In this state, as shown in FIG. 2, the end surface of the plug body 53 of the plug 51 (the surface opposite to the plug lid portion 55) is substantially in contact with the end surface of the bush 41 (bushing 41a, 41b). In the internal space 33, the position of the bush 41 (bush 41a, 41b) in the direction along the straight line L is fixed. In addition, in this state, as shown in FIG. 2, the lower base (radius r <b> 2) of the truncated cone portion 27 a of the support rod portion 27 of the toothbrush main body 21 is substantially in contact with the plug lid portion 55 of the plug 51, thereby The toothbrush body 21 is restricted from moving toward the plug 51 in the internal space.
Finally, the female thread part 61 b of the cap part 61 is screwed into the male thread part 34 a of the grip body part 33, and the cap part 61 is attached to the grip body part 33.
In this way, the present toothbrush 11 shown in FIGS. 1 and 2 can be configured.

In the present toothbrush 11 shown in FIGS. 2, 5, 6 and 7, the inner surface of the small inner peripheral portion of the bush 41 (bushing 41a, 41b) and the truncated cone portion 27a fitted inside the small inner peripheral portion. A gap 71 exists between the outer surface and the outer surface. For this reason, when the toothbrush body 21 is pulled after removing the cap part 61 from the grip body part 33 (in the direction of arrow M in FIG. 6), the inner surface of the small inner peripheral part of the bush 41 (bushings 41a and 41b) The toothbrush main body 21 can be pulled out (in the direction of arrow M in FIG. 6) until the outer surface of the truncated cone portion 27a fitted in the peripheral portion comes into contact (until the gap 71 disappears).
8 shows a state where the toothbrush body 21 is fully drawn out from the state of FIG. 6 (in the direction of arrow M in FIG. 6), and FIG. 9 is a cross-sectional view of FIG. It is AA sectional drawing of FIG. 8, FIG.9 (b) is BB sectional drawing of FIG. In the state shown in FIGS. 8 and 9, by pulling out the toothbrush main body 21 from the state of FIGS. 6 and 7, the truncated cone part 27a fitted into the small inner peripheral part of the bush 41 (bushing 41a, 41b). The portion is thicker than that in the state of FIGS. 6 and 7 (the portion existing in the direction near the lower bottom of the radius r2), and the inner surface of the small inner peripheral portion of the bush 41 (bush 41a, 41b) , The outer surface of the truncated cone portion 27a fitted inside the small inner peripheral portion abuts, and the gap 71 that existed in the state of FIGS. 6 and 7 disappears (in FIG. 8 and FIG. The portion of the truncated cone portion 27a fitted in the periphery is a (straight) truncated cone shape (substantially the same shape as the small inner periphery) with the straight line L of the upper base radius rbb2a and the lower base radius rbb2b as the axis. ) In this way, the inner surface of the small inner peripheral portion of the bush 41 (bush 41a, 41b) and the outer surface of the truncated cone portion 27a fitted in the small inner peripheral portion are in surface contact with each other, so that the grip portion 31 is contacted. The toothbrush body 21 is prevented from being pulled out further, and the toothbrush body 21 is securely fixed to the grip portion 31.
The toothbrush 11 can be used for tooth brushing with the toothbrush body 21 fixed to the gripping part 31 as shown in FIGS. 8 and 9, and after brushing, the brush bristles 23 and the head part 25 are washed. By retracting the toothbrush body 21 (in the direction of arrow N in FIG. 8), the state of FIGS. 6 and 7 can be obtained again. Then, what is necessary is just to carry the main toothbrush 11 by attaching the cap part 61 to the holding | maintenance main-body part 33. FIG.

In order to replace the toothbrush main body 21, the cap 61 and the plug 51 are removed from the gripping main body 33, and then the bush 41 (bushings 41a and 41b) is inserted into the female thread portion 34b of the gripping main body 33 as shown in FIG. What is necessary is just to extract from the formed opening (opening 33h), and to extract the toothbrush main body 21 in the arrow K direction in FIG. Thereafter, the truncated cone portion 27a of the support rod portion 27 of the new toothbrush main body 21 is inserted into the internal space of the gripping main body portion 33 from the lower base (radius r2) side, and the bush 41a and the bush 41b are inserted into the female screw of the gripping main body portion 33. The bush 41a and the bush 41b are inserted into the internal space of the gripping main body 33 through the opening 33h in which the portion 34b is formed, and the truncated cone portion 27a is fitted into the small inner peripheral portion as shown in FIG. combine. Thereafter, the toothbrush body 21 can be replaced by attaching the cap part 61 and the plug 51 to the grip body part 33.
In addition, the bush 41 (bush 41a, 41b) in which the truncated cone part 27a is fitted into the small inner peripheral part is extracted from the opening 33h in which the female thread part 34b of the gripping body part 33 is formed, or is again gripped from the opening 33h. When the truncated cone part 27a is inserted into the inner space 33 and fitted into the small inner peripheral part, the bush 41 (bush 41a, 41b) formed of a flexible resin material is slightly deformed (elastically deformed). Just do it.

  As described above, the toothbrush 11 includes the toothbrush body 21 having the head portion 25 in which the brush bristles 23 are implanted, and the rod-like support rod portion 27 to which the head portion 25 is attached at the tip. A hollow gripping portion 31 having an internal space 36, in which the base end of the support rod portion 27 (here, the lower bottom end of the radius r2) is accommodated in the internal space 36 and the head portion 25 protrudes. A through hole (here, the small inner peripheral portion of the bush 41 formed by combining the bushes 41a and 41b) is defined so as to pass through the support rod portion 27 so as to be slidable (slidable between FIGS. 6 and 8). And the support rod 27 at least in one of the sliding positions (here, the most retracted sliding position in FIG. 2) with respect to the through hole (the hole defined by the small inner peripheral portion of the bush 41). Oh A portable toothbrush comprising a cap portion 61 that covers the portion of the toothbrush main body 21 protruding from the through hole (the hole defined by the small inner peripheral portion of the bush 41) and is detachably attached to the grip portion 31. is there.

In the present toothbrush 11, the support bar 27 is located at a predetermined slide position (here, the most protruding slide position in FIGS. 8 and 9) with respect to the through hole (the hole defined by the small inner periphery of the bush 41). The part 27 is fixed to the grip part 31.
In the present toothbrush 11, the support bar portion 27 has a tapered portion (here, the truncated cone portion 27a) whose width (here, the diameter) is tapered toward the distal direction (the direction of the head portion 25). At the predetermined slide position (here, the most protruded slide position in FIGS. 8 and 9), the inner surface (small inner peripheral portion of the bush 41) of the through hole (hole defined by the small inner peripheral portion of the bush 41) is tapered. The taper portion (the truncated cone portion 27a) abuts on the portion (the truncated cone portion 27a), and further moves in the distal direction (the head portion 25 direction) with respect to the through hole (the hole defined by the small inner peripheral portion of the bush 41). This is prohibited.
In the toothbrush 11, at the predetermined slide position (here, the most projecting slide position in FIGS. 8 and 9), the inner surface (small size of the bush 41) of the through hole (the hole defined by the small inner peripheral portion of the bush 41). The inner peripheral portion is in surface contact with the outer surface of the support rod portion 27 (here, the outer surface of the tapered portion (the truncated cone portion 27a)).

In the toothbrush 11, the gripping portion 31 forms an inner surface (small inner peripheral portion of the bush 41) of the through hole (hole defined by the small inner peripheral portion of the bush 41), and is a sleeve that can penetrate the support rod portion 27. (Here, the portion of the bush 41 having the small inner peripheral portion on the inner surface) and the sleeve through which the support rod portion 27 penetrates (the portion of the bush 41 having the small inner peripheral portion on the inner surface) are detachably fitted. A main body part (here, the grip body part 33) having a hole (here, a small cylindrical part having a radius rba2 with the straight line L as an axis in the internal space of the grip body part 33). Of the internal space of the gripping main body 33, it is a small cylindrical part having a radius rba2 with the straight line L as an axis, shown as an insertion hole 38 in FIG. (The part on the inner surface) In the state) of FIG. 10, in extraction possible (FIG. 10 from the support rod portion 27 fitting hole 38, is the direction of arrow K) ones.
In the present toothbrush 11, the support rod portion 27 into which the sleeve (the portion having the small inner peripheral portion of the bush 41 on the inner surface) is inserted into the sleeve (the portion having the small inner peripheral portion on the inner surface of the bush 41) is continuous. It has at least one part (here, 2) which is a divided portion (corresponding to the joint 49 of the bushes 41a and 41b) formed in the direction (direction along the straight line L).
In the present toothbrush 11, the gripping portion 31 communicates the internal space 36 and the external space 37, in which the sleeve (the portion having the small inner peripheral portion of the bush 41 on the inner surface) can be extracted from the internal space 36. It has a mouth (an opening in which the female thread portion 34b of the grip main body 33 is formed. The opening 33h in FIG. 5).
Further, in the present toothbrush 11, the grip portion 31 has an openable / closable lid (here, the plug 51) detachably attached to the communication port (the opening 33h in which the female thread portion 34b of the grip main body portion 33 is formed).
In the present toothbrush 11, a male screw portion (male screw portion 34a) formed on the outer peripheral surface of either the grip portion 31 or the cap portion 61 (here, the grip portion 31), and either one (here, the cap portion). 61), the cap 61 is detachably attached to the grip portion 31 by screwing together the female screw portion (female screw portion 61b) formed on the inner peripheral surface.

DESCRIPTION OF SYMBOLS 11 Toothbrush 21 Toothbrush main body 23 Brush bristle 25 Head part 27 Support rod part 27a Frustum part 27b Connection part 31 Gripping part 33 Gripping main part 33h Opening 34a Male thread part 34b Female thread part 36 Internal space 37 External space 38 Insertion hole 41, 41a , 41b Bush 49 Joint 51 Plug 53 Plug body 53b Male thread part 55 Plug lid part 61 Cap part 61b Female thread part 71 Gap

Claims (9)

A toothbrush body having a head portion in which brush hairs are implanted, and a rod-like support rod portion having a head portion attached to the tip;
A hollow gripping portion having an internal space, the gripping portion having a through hole through which the base end of the support rod portion is housed in the internal space and the head portion protrudes in a slidable manner. ,
A portable toothbrush comprising: a support rod portion that includes a cap portion that covers a portion of the toothbrush main body that protrudes from the through hole in at least one of the sliding positions with respect to the through hole and is detachably attached to the grip portion.     The portable toothbrush according to claim 1, wherein the support bar portion is fixed to the grip portion at a predetermined slide position with respect to the through hole. The support bar portion has a tapered portion whose width is tapered toward the distal end direction,
The portable toothbrush according to claim 2, wherein the inner surface of the through hole abuts on the tapered portion at the predetermined slide position, and the tapered portion is prohibited from further moving in the distal direction with respect to the through hole.     The portable toothbrush according to claim 2 or 3, wherein an inner surface of the through hole is in surface contact with an outer surface of the support bar portion at the predetermined slide position. The gripping portion includes a sleeve that forms the inner surface of the through hole and is detachable from the support rod portion, and a main body portion that has a fitting hole that detachably fits the sleeve that the support rod portion penetrates,
The portable toothbrush according to any one of claims 1 to 4, wherein the support rod portion can be removed from the insertion hole in a state where the sleeve is removed from the insertion hole.     The portable toothbrush according to claim 5, wherein the sleeve has at least one divided portion formed in a direction in which a support bar portion inserted into the sleeve continues.     The portable toothbrush according to claim 5 or 6, wherein the grip portion has a communication port that allows communication between the internal space and the external space from which the sleeve can be extracted from the internal space.     The portable toothbrush according to claim 7, wherein the gripping portion has an openable / closable lid that is detachable from the communication port.     The male threaded portion formed on the outer peripheral surface of one of the gripping portion and the cap portion and the female screw portion formed on the inner peripheral surface of the other one are screwed together to cap the gripping portion. The portable toothbrush according to any one of claims 1 to 8, wherein the portion is detachably attached.

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